#include "hash0hash.h"
#include "mem0mem.h"

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Functions
UNIV_INTERN void	hash_mutex_enter (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_mutex_exit (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_mutex_enter_all (hash_table_t *table)
UNIV_INTERN void	hash_mutex_exit_all (hash_table_t *table)
UNIV_INTERN void	hash_mutex_exit_all_but (hash_table_t table, ib_mutex_t keep_mutex)
UNIV_INTERN void	hash_lock_s (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_lock_x (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_unlock_s (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_unlock_x (hash_table_t *table, ulint fold)
UNIV_INTERN void	hash_lock_x_all (hash_table_t *table)
UNIV_INTERN void	hash_unlock_x_all (hash_table_t *table)
UNIV_INTERN void	hash_unlock_x_all_but (hash_table_t table, rw_lock_t keep_lock)
UNIV_INTERN hash_table_t *	hash_create (ulint n)
UNIV_INTERN void	hash_table_free (hash_table_t *table)
UNIV_INTERN void	hash_create_sync_obj_func (hash_table_t *table, enum hash_table_sync_t type, ulint n_sync_obj)

Detailed Description

The simple hash table utility

Created 5/20/1997 Heikki Tuuri

Definition in file hash0hash.cc.

Function Documentation

UNIV_INTERN hash_table_t* hash_create ( ulint n )

Creates a hash table with >= n array cells. The actual number of cells is chosen to be a prime number slightly bigger than n.

Returns: own: created table

Parameters

n	in: number of array cells

Definition at line 293 of file hash0hash.cc.

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UNIV_INTERN void hash_create_sync_obj_func	(	hash_table_t *	table,
		enum hash_table_sync_t	type,
		ulint	n_sync_obj
	)

Creates a sync object array to protect a hash table. ::sync_obj can be mutexes or rw_locks depening on the type of hash table.

Parameters

table	in: hash table
type	in: HASH_TABLE_SYNC_MUTEX or HASH_TABLE_SYNC_RW_LOCK
n_sync_obj	in: number of sync objects, must be a power of 2

Definition at line 352 of file hash0hash.cc.

UNIV_INTERN void hash_lock_s	(	hash_table_t *	table,
		ulint	fold
	)

s-lock a lock for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 129 of file hash0hash.cc.

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UNIV_INTERN void hash_lock_x	(	hash_table_t *	table,
		ulint	fold
	)

x-lock a lock for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 152 of file hash0hash.cc.

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UNIV_INTERN void hash_lock_x_all ( hash_table_t * table )

Reserves all the locks of a hash table, in an ascending order.

Parameters

table in: hash table

Definition at line 219 of file hash0hash.cc.

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UNIV_INTERN void hash_mutex_enter	(	hash_table_t *	table,
		ulint	fold
	)

Reserves the mutex for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 46 of file hash0hash.cc.

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UNIV_INTERN void hash_mutex_enter_all ( hash_table_t * table )

Reserves all the mutexes of a hash table, in an ascending order.

Parameters

table in: hash table

Definition at line 72 of file hash0hash.cc.

UNIV_INTERN void hash_mutex_exit	(	hash_table_t *	table,
		ulint	fold
	)

Releases the mutex for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 59 of file hash0hash.cc.

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UNIV_INTERN void hash_mutex_exit_all ( hash_table_t * table )

Releases all the mutexes of a hash table.

Parameters

table in: hash table

Definition at line 89 of file hash0hash.cc.

UNIV_INTERN void hash_mutex_exit_all_but	(	hash_table_t *	table,
		ib_mutex_t *	keep_mutex
	)

Releases all but the passed in mutex of a hash table.

Parameters

table	in: hash table
keep_mutex	in: mutex to keep

Definition at line 106 of file hash0hash.cc.

UNIV_INTERN void hash_table_free ( hash_table_t * table )

Frees a hash table.

Parameters

table in, own: hash table

Definition at line 334 of file hash0hash.cc.

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UNIV_INTERN void hash_unlock_s	(	hash_table_t *	table,
		ulint	fold
	)

unlock an s-lock for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 175 of file hash0hash.cc.

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UNIV_INTERN void hash_unlock_x	(	hash_table_t *	table,
		ulint	fold
	)

unlock x-lock for a fold value in a hash table.

Parameters

table	in: hash table
fold	in: fold

Definition at line 198 of file hash0hash.cc.

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UNIV_INTERN void hash_unlock_x_all ( hash_table_t * table )

Releases all the locks of a hash table, in an ascending order.

Parameters

table in: hash table

Definition at line 242 of file hash0hash.cc.

UNIV_INTERN void hash_unlock_x_all_but	(	hash_table_t *	table,
		rw_lock_t *	keep_lock
	)

Releases all but passed in lock of a hash table,

Parameters

table	in: hash table
keep_lock	in: lock to keep

Definition at line 264 of file hash0hash.cc.

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Functions

Detailed Description

Function Documentation